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#ifndef TZFILE_INCLUDED #define TZFILE_INCLUDED /* Copyright (c) 2004, 2006, 2007 MySQL AB, 2009 Sun Microsystems, Inc. Use is subject to license terms. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ /* This file is based on public domain code from ftp://elsie.ncih.nist.gov/ Initial source code is in the public domain, so clarified as of 1996-06-05 by Arthur David Olson (arthur_david_olson@nih.gov). */ /* Information about time zone files. */ #ifndef TZDIR #define TZDIR "/usr/share/zoneinfo" /* Time zone object file directory */ #endif /* !defined TZDIR */ /* Each file begins with. . . */ #define TZ_MAGIC "TZif" struct tzhead { uchar tzh_magic[4]; /* TZ_MAGIC */ uchar tzh_reserved[16]; /* reserved for future use */ uchar tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */ uchar tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ uchar tzh_leapcnt[4]; /* coded number of leap seconds */ uchar tzh_timecnt[4]; /* coded number of transition times */ uchar tzh_typecnt[4]; /* coded number of local time types */ uchar tzh_charcnt[4]; /* coded number of abbr. chars */ }; /* . . .followed by. . . tzh_timecnt (char [4])s coded transition times a la time(2) tzh_timecnt (unsigned char)s types of local time starting at above tzh_typecnt repetitions of one (char [4]) coded UTC offset in seconds one (unsigned char) used to set tm_isdst one (unsigned char) that's an abbreviation list index tzh_charcnt (char)s '\0'-terminated zone abbreviations tzh_leapcnt repetitions of one (char [4]) coded leap second transition times one (char [4]) total correction after above tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition time is standard time, if FALSE, transition time is wall clock time if absent, transition times are assumed to be wall clock time tzh_ttisgmtcnt (char)s indexed by type; if TRUE, transition time is UTC, if FALSE, transition time is local time if absent, transition times are assumed to be local time */ /* In the current implementation, we refuse to deal with files that exceed any of the limits below. */ #ifndef TZ_MAX_TIMES /* The TZ_MAX_TIMES value below is enough to handle a bit more than a year's worth of solar time (corrected daily to the nearest second) or 138 years of Pacific Presidential Election time (where there are three time zone transitions every fourth year). */ #define TZ_MAX_TIMES 370 #endif /* !defined TZ_MAX_TIMES */ #ifndef TZ_MAX_TYPES #ifdef SOLAR #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ #else /* Must be at least 14 for Europe/Riga as of Jan 12 1995, as noted by Earl Chew <earl@hpato.aus.hp.com>. */ #define TZ_MAX_TYPES 20 /* Maximum number of local time types */ #endif /* defined SOLAR */ #endif /* !defined TZ_MAX_TYPES */ #ifndef TZ_MAX_CHARS #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ /* (limited by what unsigned chars can hold) */ #endif /* !defined TZ_MAX_CHARS */ #ifndef TZ_MAX_LEAPS #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ #endif /* !defined TZ_MAX_LEAPS */ #ifndef TZ_MAX_REV_RANGES #ifdef SOLAR /* Solar (Asia/RiyadhXX) zones need significantly bigger TZ_MAX_REV_RANGES */ #define TZ_MAX_REV_RANGES (TZ_MAX_TIMES*2+TZ_MAX_LEAPS*2+2) #else #define TZ_MAX_REV_RANGES (TZ_MAX_TIMES+TZ_MAX_LEAPS+2) #endif #endif #define SECS_PER_MIN 60 #define MINS_PER_HOUR 60 #define HOURS_PER_DAY 24 #define DAYS_PER_WEEK 7 #define DAYS_PER_NYEAR 365 #define DAYS_PER_LYEAR 366 #define SECS_PER_HOUR (SECS_PER_MIN * MINS_PER_HOUR) #define SECS_PER_DAY ((long) SECS_PER_HOUR * HOURS_PER_DAY) #define MONS_PER_YEAR 12 #define TM_YEAR_BASE 1900 #define EPOCH_YEAR 1970 /* Accurate only for the past couple of centuries, that will probably do. */ #define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0)) #endif